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    <title>The deal.II Readme on interfacing to GSL</title>
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    <h2>Installation of <acronym>GSL</acronym></h2>

    <p>
      <a href="http://www.gnu.org/software/gsl/">GNU Scientific Library</a>
      provides a wide range of mathematical routines such as random number
  	  generators, special functions and least-squares fitting.
      <a href="http://www.gnu.org/software/gsl/" target="_top">GSL</a>
      should be readily packaged by most Linux distributions.
      Don't forget to install a development version of the library.
    </p>

    <p>
      Below is a short summary of instructions on how to compile and install
      <acronym>GSL</acronym> by hand (for the case you wish to do so).
    </p>

    <h3>How to compile and install <acronym>GSL</acronym> by hand</h3>

    <p>
      After you downloaded the <acronym>GSL</acronym> library and unzip the files,
      run <code>./configure --prefix=/path/to/gsl/</code> followed by
      <code>make</code> and <code>make install</code>.
    </p>

    <h2>Interfacing <acronym>deal.II</acronym>
      to <acronym>GSL</acronym></h2>

    <p>
      Support for <acronym>GSL</acronym> will be
      enabled automatically if a system wide installation of
      <acronym>GSL</acronym> can be found.
      To use a self compiled version, specify
      <pre>

    -DGSL_DIR=/path/to/gsl
      </pre>
      when invoking <code>cmake</code>.
    </p>
    <p>
      You can override the autodetection by manually setting
      <pre>

    -DDEAL_II_WITH_GSL=OFF|ON
      </pre>.
    </p>

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